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EEE :: Multistage Transistor Amplifiers

  1. The upper or lower cut off frequency is also called ___________ frequency

  2. A.

     Resonant

    B.

     Sideband

    C.

     3 db

    D.

     None of the above

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  3. The best frequency response is of ___________ coupling

  4. A.

     RC

    B.

     Transformer

    C.

     Direct

    D.

     None of the above

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  5. 1 db corresponds to ___________ change in voltage or current level

  6. A.

     40%

    B.

     80%

    C.

     20%

    D.

     25%

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  7. In an RC coupled amplifier, the voltage gain over mid-frequency range ___________

  8. A.

     Changes abruptly with frequency

    B.

     Is constant

    C.

     Changes uniformly with frequency

    D.

     None of the above

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  9. In an RC coupling scheme, the coupling capacitor CC must be large enough ___________

  10. A.

     To pass d.c. between the stages

    B.

     Not to attenuate the low frequencies

    C.

     To dissipate high power

    D.

     None of the above

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  11. An advantage of RC coupling scheme is the ___________

  12. A.

     Good impedance matching

    B.

     Economy

    C.

     High efficiency

    D.

     None of the above

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  13. When a multistage amplifier is to amplify d.c. signal, then one must use coupling

  14. A.

     RC

    B.

     Transformer

    C.

     Direct

    D.

     None of the above

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  15. The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?

  16. A.

     2 W

    B.

     6 W

    C.

     68 W

    D.

     None of the above

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  17. A gain of 1,000,000 times in power is expressed by ___________

  18. A.

     30 db

    B.

     60 db

    C.

     120 db

    D.

     600 db

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  19. A gain of 1000 times in voltage is expressed by ___________

  20. A.

     60 db

    B.

     30 db

    C.

     120 db

    D.

     600 db

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